Apparatus for making multicolored paperboards



(3. F. SCHAUB April 14, 1936.

APPARATUS FOR MAKING MULTICOLORED PAPERBOARDS ATTORN EY Patented Apr. 14, 1936 PATENT OFFICE APPARATUS FOR MAKING MULTICOLORED PAPERBOARIDS Charles F. Schaub, Longview, Wash.

Application February 15, 1932, Serial No. 593,079 Renewed April 23, 1934 Claims. (01. 9242) The invention relates to a process of and apparatus for making color faced paper boards or multi-colored paper boards.

The primary aim of the present invention is to produce a paper board wherein a single tone or mottled or multi-colored surfacing will be effected and such coloring being built into the board by the blending of color or colors in the pulp from which the said board is made with the result that one side of the latter will be devoid of color while the other side is colored and this being carried out in a novel manner so that a better and more attractive product is had with economy in the manufacture thereof.

Another object of the invention is to effect a product, wherein by introducing a colored pulp to a paper board machine that this pulp will form with other pulp the body of the paper board with coloring only at one side of the same,

2 thereby eliminating color printing or supplemental facing or otherwise separate decorative finishing of such boards and with a saving in production cost as well as material consumption with a resultant perfect surfacing with neat and attractive appearance.

A further object of the invention is the provision of an apparatus for the carrying out of the foregoing process wherein the construction thereof is novel in form and is adaptable to standard paper board making machines.

A further object of the invention is the production of a material of the character specified wherein in the use of the apparatus the process is rendered more expeditious and cheaper.

35 With the foregoing and other objects in view the invention not only consists in the steps of the process but also in the construction and arrangement of parts of the apparatus as will be hereinafter more fully described and illustrated 40 in the accompanying drawing which discloses the preferred embodiment of the invention and pointed out in the claims hereunto appended.

In the accompanying drawing:

Figure 1 is a fragmentary perspective View showing diagrammatically a portion of a paper board making machine and the apparatus constructed in accordance with the invention in association therewith for carrying out the process of making multi-colored faced paper boards.

' 5 Figure 2 is a fragmentary vertical transverse sectional View.

Similar reference characters indicate corresponding parts throughout the several views in the drawing. 55 Referring to the drawing in detail, A designates a portion of a pulp vat and this may be the final one of a paper board making machine, the vat being of standard construction and has arranged therein the usual suction cylinder B which is rotatable and on which is formed or collected pulp from the vat A in the making of paper boards, the cylinder being also of standard construction. Above this cylinder B is arranged the revolving supporting roll C for a traveling felt or belt D for conveying pulp from the cylinder B to a vat, the felt or belt being likewise of standard construction. The pulp is introduced into the vat A through a feed pipe Ill opening thereinto through its bottom and such pulp passes first from a compartment II into a second compartment l2 and thence into the vat A, the level of the pulp within the latter being in a plane with the top edges of the partitions I3 separating the said compartments and the same from the vat, while the cylinder B rotates within the pulp held in the vat A so that a ply of such pulp is collected onto this cylinder and delivered to the felt or belt D whence such pulp in the finishing steps for the making of a paper board is conveyed by the felt or belt to drying cylinders of the paper board making machine.

In association with the vat A is the apparatus constituting the present invention and used in carrying out the process of making multi-colored paper boards and this apparatus comprises a vat I4 of any desired capacity which is elevated close to the plane of the top edge of the vat A and supported in any desirable manner. The vat I4 is arranged vertically and longitudinally disposed therein is a lower stationary bafile I5 and an upper adjustable balile IS, the latter being raised and lowered through the medium of a hand screw II suitably fitted at each end of the vat I4 so that the adjustable baffle I6 can be raised or lowered to the desired degree for the control of the flow of pulp from the vat I4 into a chamber l8 formed therein. The pulp is introduced into the vat I4 through the medium of a supply conduit or pipe I9 which opens through the bottom thereof and if found desirable a number of conduits or pipes can be employed for the feeding of the pulp to the vat I4. Within the Vat I4 is a bladed wheel agitator 20, the same being rotatable and driven in any suitable manner, the power applied being preferably through the medium of a belt 2| and a pulley 22 therefor, and the purpose of the working of the agitator is to control the mixture according to the water content of the pulp with the vat I4 and this wa- 1 ter is delivered to said vat through a Water pipe 23 opening into the vat near the top thereof and being provided with a suitable hand valve 24. The pulp sent into the vat M flows over the top edge of the adjustable baffle H5 into the chamber I8 from whence it flows onto a slanting table 25, the latter being directed in its inclination to the cylinder B so that this pulp gravitating upon the table 25 will confront the cylinder to be collected thereby.

The chamber M at the pulp flow side thereof has arranged at its top edge a swivelled flow controlling bar 2%, the swivel being at one end thereof while its opposite end is hand regulated, and in this way the level of the flow of pulp from the vat I8 through the chamber i4 therein onto the slanting table 25 can be had.

Arranged contiguous to the cylinder B between the roll C and the table 25 is a spray pipe 2'? which serves to clean the cylinder B at the area thereof approaching the slanting table 25 so that such cylinder will be cleansed before pulp is applied from the table 25 and this table may be of any desirable construction to constitute a carrier for the pulp to said cylinder from the vat I4.

The pulp introduced through the conduit or pipe #9 into the vat M is given color or mixtures of colors and the nature of the pulp is preferably of long fibred character, e. g., sulphite or rag pulp and when delivered into the vat I l has introduced therein water from the pipe 23 accordingly to the desired Water content, while the agitator 2Q assures a proper mixture. This colored pulp flows from the vat i i into the chamber l8 and thence onto the table 25 for delivery to the cylinder B. The cylinder B is revolving in the body about the pulp Within the vat A which pulp is devoidof color so that under working of the cylinder the latter collects the pulp in ply form thereonto, it being apparent that the carried pulp collected by said cylinder B is first taken onto said cylinder and the pulp within the vat A is built thereonto whence this built pulp is carried onto the felt or belt D and conveyed to the drier of the paper making machine for the final finishing of such product.

The colored pulp from the vat l4 and the pulp devoid of color from the vat A in the reception thereof by the cylinder B will build one upon the other so that the finished product will have a colored surface, either of one hue or mottled or multi-colored and thus in carrying out the foregoing process of the making of multi-colored paper boards there is eliminated the necessity of color printing the paper board or separately applying a colored covering strip therefor or otherwise separately coloring such boards.

The table 25 discharges onto the cylinder B at substantially a midpoint in the area bounded by the roll 0 and the level of the contents in the vat A on that side towards which the upper zone of the cylinder is moving. The discharge from the table is thus a substantial distance above the level of the contents in the vat A, so that there is ample time for the formation of a film or layer of colored pulp on the cylinder before the particular portion on which the colored pulp discharge is made enters the contents of the vat A.

By the disposition of the spray pipe adjacent the point of discharge from the table 25, but above the latter, the flow through such spray pipe can be varied, thereby giving to the spray pipe the added function of thinning out the colored pulp, if so desired, so that the colored pulp layer may be made comparatively heavy or light, depending on the discharge through the spray pipe.

Arranged at the fiow surface of the table 25 are ripples or breakers 28, these being so placed between the upper vat l4 and the cylinder B to break the flow of pulp from the said vat to the cylinder, which would otherwise flow too fast from the mixing tank to the said cylinder. It is of course understood that any number of ripples or breakers may be used upon the table 25 as the operator may deem necessary in order to procure the proper mixture when the colored material reaches the cylinder B.

The process constituting the present invention involves the application of colored pulps to a paper board on a cylinder paper or paper board producing machine so that the colored paper board will present a colored or multi-colored surface thereto and built into the same during the making of such paper board.

What is claimed is:--

1. An apparatus for making multi-colored paper boards, comprising a. pulp vat, a rotatable suction cylinder journaled in said vat and movable counterclockwise, a. superposed cylinder journaled above the first named cylinderand movable clockwise for the travel of a pulp conveying felt, means for introducing pulp into the vat through the bottom thereof, a plurality of partitions arranged in the vat forming several.

compartments for the passage successively of the pulp from one to the other, a second vat elevated close to the plane of the top of the first named vat, vertically and longitudinally disposed baffles arranged in the second vat, the lowermost of said.

baffles being stationary, means on the second vat to vertically adjust the other bafiies, means for supplying pulp to the second vat, an agitator within said second vat, aslanting flow table between said vats and extended close to the first per boards, comprising a pulp vat, a rotatablesuction cylinder journaled in said vat and movable counterclockwise, a superposed cylinder journaled above the first named cylinder and movable clockwise for the travel of a pulp conveying felt, means for introducing pulp into the vat through the bottom thereof, a plurality of partitions arranged in the vat forming several compartments for the passage successively of the pulp from one to the other, a second vat elevated close to the plane of the top of the first named vat, vertically and longitudinally disposed baflies arranged in the second vat, the lowermost of said baifles being stationary, means on the second vat to vertically adjust the other bafiles, means for supplying pulp to the second vat, an agitator within said second vat, a slanting flow table between said vats and extended close'to the first named cylinder, an adjustable flow controlling bar arranged in the second vat in confronting relation to the flow table, and a spray device located next to the first named cylinder.

3. Apparatus for making multi-colored paper boards comprising a vat for plain pulp, a vat for colored pulp, a suction cylinder rotatably mounted in the first said vat and having an upper zone= level of the contents of the first said vat but on that side of the delivery felt away from which the cylinder is rotated, the second said vat bein provided with an inclined flow table terminating at the periphery of the cylinder just below the spray pipe.

4. Apparatus for making multi-colored paper boards comprising a vat for plain pulp, a vat for colored pulp, a suction cylinder rotatably mounted in the first said vat and having an upper zone above the level of the contents of said vat, a delivery felt disposed adjacent said upper zone for receiving from said cylinder the pulp accumulated in the rotation of the cylinder, a spray pipe disposed adjacent the cylinder above the level of the contents of the first said vat but on that side of the delivery felt away from which the cylinder is rotated, the second said vat being provided with an inclined flow table terminating at the periphery of the cylinder just below the spray pipe, the second said vat having a flow control bar to govern the flow of pulp onto the flow table and. the latter having spaced transverse ripples or breakers on its upper face.

5. Amethod of forming multi-colored paper boards in which plain pulp is taken up by a suction cylinder having an upper zone above the level of the pulp and delivered to a felt in peripheral contact with said upper zone, the step which comprises delivering colored pulp to the suction cylinder at a substantial distance above the level of the plain pulp but in that area which has passed the felt and is about to enter the plain pulp and simultaneously regulating its density with a variable water spray.

CHARLES F. SCHAUB. 

